Android基础TOP6_2:Gallery +Image完成画廊

Activity：

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.example.top6_2.MainActivity" >
 <Gallery
     android:id="@+id/gly"
     android:layout_height="wrap_content"
     android:layout_width="fill_parent"
     android:animationDuration=""
     android:spacing="20dp"
     android:unselectedAlpha="0.5"
      />
    <ImageView
        android:id="@+id/img"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        />

 </LinearLayout>

JAVA:

MinActivity:

 package com.example.top6_2;

 import android.R.integer;
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.Gallery;
 import android.widget.ImageView;

 public class MainActivity extends Activity {
     private Gallery gal;
     private ImageView iv;
     private ImageAdapter adapter;
     private static final int[]  imgslds={
             R.drawable.bjl,
             R.drawable.dfhgc,
             R.drawable.fg,
             R.drawable.gj
     };
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
    iv=(ImageView) findViewById(R.id.img);
    gal=(Gallery) findViewById(R.id.gly);
    adapter=new ImageAdapter(this);
    gal.setAdapter(adapter);
     gal.setOnItemSelectedListener(gaILidstener);
     }
         private Gallery.OnItemSelectedListener gaILidstener=new Gallery.OnItemSelectedListener() {

         @Override
         public void onItemSelected(AdapterView<?> parent, View view,
                 int position, long id) {
             // TODO Auto-generated method stub
             iv.setImageResource(imgslds[position]);
         }

         @Override
         public void onNothingSelected(AdapterView<?> parent) {
             // TODO Auto-generated method stub

         }
     };
     }

ImagrAdapter:

 package com.example.top6_2;

 import android.R.integer;
 import android.content.Context;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 import android.widget.Gallery;
 import android.widget.ImageView;

 public class ImageAdapter extends BaseAdapter {
     private Context context;

     private static final int[]  imgslds={
         R.drawable.bjl,
         R.drawable.dfhgc,
         R.drawable.fg,
         R.drawable.gj
 };
     public ImageAdapter(Context c){
         context=c;

     }
     public int getCount() {
         // TODO Auto-generated method stub
         //
         return imgslds.length;

     }

     @Override
     public Object getItem(int position) {
         // TODO Auto-generated method stub
         return position;
     }

     @Override
     public long getItemId(int position) {
         // TODO Auto-generated method stub
         return position;
     }

     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         // TODO Auto-generated method stub
         ImageView iv=new ImageView(context);
         iv.setImageResource(imgslds[position]);
         iv.setScaleType(ImageView.ScaleType.FIT_CENTER);
         iv.setLayoutParams(new Gallery.LayoutParams(,));
                     return iv;
     }

 }

效果图：